/* ==========================================================================
   新宝体育 · 共享样式表 /assets/site.css
   深空蓝近单色阶底座 + 竞技橙唯一主强调 + 荧光绿数据高亮
   ========================================================================== */

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 104px;
}

body,
h1, h2, h3, h4, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; }
img, svg, video { display: block; max-width: 100%; }
table { border-collapse: collapse; }

:where(a, button, summary, [tabindex]):focus-visible {
  outline: 2px solid #35E08A;
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- tokens ---------- */
:root {
  --xb-deep: #0A1A2E;
  --xb-night: #12263F;
  --xb-tactic: #1B3A5C;
  --xb-rule: #2E4A68;
  --xb-mist: #93A4B5;
  --xb-snow: #F5F8FB;
  --xb-orange: #FF6A1F;
  --xb-green: #35E08A;
  --xb-amber: #FFC24B;
  --xb-ink: #10233A;

  --xb-font-cn: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --xb-font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --xb-max: 1360px;
  --xb-gutter: clamp(16px, 3vw, 34px);
  --xb-radius: 14px;
  --xb-shadow: 0 20px 48px -24px rgba(0, 0, 0, .88);
  --xb-z-header: 60;
}

/* ---------- base ---------- */
body {
  min-height: 100vh;
  background: var(--xb-deep);
  color: var(--xb-snow);
  font-family: var(--xb-font-cn);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .004em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: rgba(255, 106, 31, .34); color: var(--xb-snow); }

/* ---------- 布局 ---------- */
.xb-wrap {
  width: min(var(--xb-max), 100% - var(--xb-gutter) * 2);
  margin-inline: auto;
}

.xb-section { padding-block: clamp(52px, 7vw, 108px); }
.xb-section--tight { padding-block: clamp(28px, 4vw, 58px); }

.xb-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 24px;
  margin-bottom: clamp(22px, 3vw, 42px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--xb-rule);
}

.xb-grid { display: grid; gap: clamp(20px, 3vw, 42px); }
.xb-grid--5-7 { grid-template-columns: 5fr 7fr; }
.xb-grid--7-5 { grid-template-columns: 7fr 5fr; }
.xb-grid--4-8 { grid-template-columns: 4fr 8fr; }
.xb-grid--index { grid-template-columns: minmax(170px, 3fr) 9fr; }

.xb-stack-offset > *:nth-child(2n) { transform: translateX(18px); }

/* ---------- 排版 ---------- */
.xb-display {
  font-size: clamp(2.2rem, 5vw, 4.25rem);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -.02em;
}

.xb-h2 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.02em;
}

.xb-h3 {
  font-size: clamp(1.12rem, 1.6vw, 1.4rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -.01em;
}

.xb-lead {
  max-width: 62ch;
  font-size: clamp(1rem, 1.15vw, 1.06rem);
  color: var(--xb-mist);
}

.xb-prose { max-width: 70ch; }
.xb-prose p + p { margin-top: 1em; }

.xb-eyebrow {
  font-family: var(--xb-font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--xb-mist);
}

.xb-num,
.xb-mono {
  font-family: var(--xb-font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

/* 浅色阅读区 */
.xb-light { background: var(--xb-snow); color: var(--xb-ink); }
.xb-light .xb-lead,
.xb-light .xb-eyebrow { color: #47607a; }

/* 斜向分割过渡 */
.xb-slant {
  background: var(--xb-snow);
  color: var(--xb-ink);
  clip-path: polygon(0 3.4rem, 100% 0, 100% 100%, 0 100%);
  margin-top: -3.4rem;
  padding-top: 5.4rem;
}

/* ---------- 按钮 ---------- */
.xb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: .86rem;
  font-weight: 600;
  letter-spacing: .02em;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
}

.xb-btn--primary {
  background: var(--xb-orange);
  border-color: var(--xb-orange);
  color: var(--xb-deep);
}
.xb-btn--primary:hover { background: #FF7F3D; transform: translateY(-1px); }

.xb-btn--ghost {
  background: rgba(18, 38, 63, .5);
  border-color: var(--xb-rule);
  color: var(--xb-snow);
}
.xb-btn--ghost:hover { border-color: var(--xb-orange); color: var(--xb-orange); }

.xb-btn--sm { padding: 8px 13px; font-size: .78rem; }

/* ---------- 徽标 / 状态 ---------- */
.xb-chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 9px;
  border: 1px solid var(--xb-rule);
  border-radius: 6px;
  background: rgba(18, 38, 63, .6);
  color: var(--xb-mist);
  font-family: var(--xb-font-mono);
  font-size: .68rem;
  letter-spacing: .08em;
  white-space: nowrap;
}
.xb-chip--season {
  color: var(--xb-amber);
  border-color: rgba(255, 194, 75, .45);
  background: rgba(255, 194, 75, .09);
}

.xb-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid var(--xb-rule);
  border-radius: 99px;
  color: var(--xb-mist);
  font-family: var(--xb-font-mono);
  font-size: .64rem;
  letter-spacing: .1em;
  white-space: nowrap;
}
.xb-tag--ok { color: var(--xb-green); border-color: rgba(53, 224, 138, .5); background: rgba(53, 224, 138, .1); }
.xb-tag--pending { color: var(--xb-amber); border-color: rgba(255, 194, 75, .5); background: rgba(255, 194, 75, .1); }
.xb-tag--live { color: var(--xb-orange); border-color: rgba(255, 106, 31, .5); background: rgba(255, 106, 31, .12); }

/* ---------- 头部 ---------- */
.xb-skip {
  position: absolute;
  left: 14px;
  top: 0;
  z-index: 90;
  padding: 10px 16px;
  border-radius: 0 0 10px 10px;
  background: var(--xb-orange);
  color: var(--xb-deep);
  font-size: .84rem;
  font-weight: 700;
  transform: translateY(-150%);
  transition: transform .2s ease;
}
.xb-skip:focus { transform: translateY(0); }

.xb-header {
  position: sticky;
  top: 0;
  z-index: var(--xb-z-header);
  background: linear-gradient(180deg, rgba(10, 26, 46, .985) 60%, rgba(10, 26, 46, .92));
  border-bottom: 1px solid var(--xb-rule);
  color: var(--xb-snow);
  backdrop-filter: blur(12px);
}

.xb-header__rule {
  height: 8px;
  border-bottom: 1px solid rgba(46, 74, 104, .55);
  background-image:
    repeating-linear-gradient(90deg, var(--xb-rule) 0 1px, transparent 1px 16px),
    repeating-linear-gradient(90deg, rgba(255, 106, 31, .7) 0 1px, transparent 1px 160px);
  background-repeat: repeat-x;
  opacity: .85;
}

.xb-progress {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 80;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--xb-orange), var(--xb-green));
  transform: scaleX(var(--xb-progress, 0));
  transform-origin: 0 50%;
  pointer-events: none;
}

.xb-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  width: min(var(--xb-max), 100% - var(--xb-gutter) * 2);
  min-height: 74px;
  margin-inline: auto;
}

.xb-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
  padding-block: 10px;
}

.xb-brand__mark {
  position: relative;
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  border: 1px solid var(--xb-rule);
  border-radius: 11px;
  background: linear-gradient(150deg, var(--xb-tactic), var(--xb-night) 72%);
  overflow: hidden;
}
.xb-brand__mark::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 24px;
  height: 24px;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(53, 224, 138, .78);
  border-radius: 50%;
}
.xb-brand__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  width: 1px;
  height: 100%;
  transform: translateX(-50%);
  background: rgba(53, 224, 138, .5);
}

.xb-brand__text { display: flex; flex-direction: column; line-height: 1.15; }

.xb-brand__name {
  font-size: 1.06rem;
  font-weight: 800;
  letter-spacing: -.01em;
}

.xb-brand__tagline {
  margin-top: 2px;
  font-family: var(--xb-font-mono);
  font-size: .64rem;
  letter-spacing: .1em;
  color: var(--xb-mist);
}

.xb-header__meta { display: flex; align-items: center; gap: 8px; }

.xb-header__actions { display: flex; align-items: center; gap: 10px; }

/* ---------- 导航 ---------- */
.xb-nav__list { display: flex; align-items: stretch; }

.xb-nav__link {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding: 12px 11px;
  border-left: 2px solid transparent;
  color: var(--xb-mist);
  font-size: .9rem;
  white-space: nowrap;
  transition: color .2s ease, background-color .2s ease, border-color .2s ease;
}

.xb-nav__ix {
  font-family: var(--xb-font-mono);
  font-size: .6rem;
  letter-spacing: .06em;
  color: var(--xb-rule);
}

.xb-nav__link:hover {
  color: var(--xb-snow);
  background: rgba(27, 58, 92, .5);
  border-left-color: rgba(255, 106, 31, .6);
}

.xb-nav__link[aria-current="page"] {
  color: var(--xb-snow);
  border-left-color: var(--xb-orange);
  background: linear-gradient(90deg, rgba(255, 106, 31, .16), transparent 72%);
}
.xb-nav__link[aria-current="page"] .xb-nav__ix { color: var(--xb-orange); }

.xb-navtoggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border: 1px solid var(--xb-rule);
  border-radius: 9px;
  background: rgba(18, 38, 63, .7);
  color: var(--xb-snow);
  font-family: var(--xb-font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  cursor: pointer;
}
.xb-navtoggle__bars { display: inline-flex; flex-direction: column; gap: 4px; }
.xb-navtoggle__bars i {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--xb-orange);
  transition: transform .24s ease, opacity .24s ease;
}
.xb-navtoggle[aria-expanded="true"] .xb-navtoggle__bars i:first-child { transform: translateY(3px) rotate(45deg); }
.xb-navtoggle[aria-expanded="true"] .xb-navtoggle__bars i:last-child { transform: translateY(-3px) rotate(-45deg); }

/* ---------- 页脚 ---------- */
.xb-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 112px);
  padding-top: clamp(46px, 6vw, 78px);
  background: linear-gradient(180deg, var(--xb-night), var(--xb-deep) 62%);
  border-top: 1px solid var(--xb-rule);
  color: var(--xb-snow);
}
.xb-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 8px;
  background-image: repeating-linear-gradient(90deg, var(--xb-rule) 0 1px, transparent 1px 16px);
  opacity: .7;
}

.xb-footer__grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr 1.2fr;
  gap: clamp(26px, 3.4vw, 48px);
  padding-bottom: clamp(30px, 4vw, 46px);
}

.xb-footer__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.xb-footer__brand .xb-brand__mark { width: 32px; height: 32px; border-radius: 9px; }

.xb-footer__name {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -.01em;
}

.xb-footer__desc {
  max-width: 36ch;
  color: var(--xb-mist);
  font-size: .88rem;
  line-height: 1.72;
}

.xb-footer__source {
  margin-top: 12px;
  max-width: 36ch;
  color: var(--xb-mist);
  font-size: .78rem;
  line-height: 1.7;
}

.xb-footer__title {
  margin-bottom: 14px;
  font-family: var(--xb-font-mono);
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .18em;
  color: var(--xb-mist);
  text-transform: uppercase;
}

.xb-footer__list { display: grid; gap: 9px; }

.xb-footer__link {
  display: inline-block;
  color: var(--xb-snow);
  font-size: .88rem;
  opacity: .86;
  transition: color .2s ease, opacity .2s ease, transform .2s ease;
}
.xb-footer__link:hover {
  color: var(--xb-orange);
  opacity: 1;
  transform: translateX(3px);
}

.xb-footer__contact {
  color: var(--xb-mist);
  font-size: .82rem;
  line-height: 1.7;
  word-break: break-word;
}
.xb-footer__list--plain .xb-footer__contact:first-child { color: var(--xb-snow); }

.xb-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 20px 30px;
  border-top: 1px dashed rgba(46, 74, 104, .7);
  color: var(--xb-mist);
  font-family: var(--xb-font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
}

.xb-footer__note { max-width: 52ch; }

.xb-totop {
  position: fixed;
  right: 20px;
  bottom: 22px;
  z-index: 55;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--xb-rule);
  border-radius: 14px;
  background: rgba(18, 38, 63, .94);
  color: var(--xb-snow);
  font-family: var(--xb-font-mono);
  font-size: .68rem;
  letter-spacing: .08em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .25s ease, transform .25s ease, visibility .25s ease, border-color .2s ease, color .2s ease;
}
.xb-totop.is-visible { opacity: 1; visibility: visible; transform: none; }
.xb-totop:hover { border-color: var(--xb-orange); color: var(--xb-orange); }

/* ---------- 面板 / 卡片 ---------- */
.xb-panel {
  padding: clamp(20px, 2.4vw, 30px);
  border: 1px solid var(--xb-rule);
  border-radius: 20px;
  background: linear-gradient(165deg, rgba(18, 38, 63, .95), rgba(10, 26, 46, .9));
  box-shadow: var(--xb-shadow);
}
.xb-panel--accent {
  border-color: rgba(255, 106, 31, .6);
  box-shadow: inset 2px 0 0 var(--xb-orange), var(--xb-shadow);
}
.xb-panel--off {
  background: var(--xb-snow);
  border-color: #D6E0EA;
  color: var(--xb-ink);
  box-shadow: none;
}
.xb-panel + .xb-panel { margin-top: 16px; }

/* ---------- 指标 ---------- */
.xb-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  border: 1px solid var(--xb-rule);
  border-radius: var(--xb-radius);
  background: rgba(18, 38, 63, .55);
}
.xb-stat__label {
  font-family: var(--xb-font-mono);
  font-size: .66rem;
  letter-spacing: .14em;
  color: var(--xb-mist);
}
.xb-stat__value {
  font-family: var(--xb-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 600;
  line-height: 1.1;
  color: var(--xb-snow);
}
.xb-stat__value--up { color: var(--xb-green); }
.xb-stat__value--hint { color: var(--xb-amber); }

/* ---------- 进度槽 ---------- */
.xb-meter {
  position: relative;
  height: 8px;
  border-radius: 99px;
  background: var(--xb-tactic);
  overflow: hidden;
}
.xb-meter__fill {
  display: block;
  height: 100%;
  width: var(--xb-fill, 0%);
  border-radius: inherit;
  background: linear-gradient(90deg, var(--xb-orange), var(--xb-green));
  transition: width .9s cubic-bezier(.2, .7, .2, 1);
}

/* ---------- 表格 ---------- */
.xb-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--xb-rule);
  border-radius: var(--xb-radius);
  background: rgba(18, 38, 63, .45);
  -webkit-overflow-scrolling: touch;
}
.xb-table { width: 100%; font-variant-numeric: tabular-nums; }
.xb-table th {
  padding: 11px 14px;
  border-bottom: 1px solid var(--xb-rule);
  color: var(--xb-mist);
  font-family: var(--xb-font-mono);
  font-size: .68rem;
  font-weight: 500;
  letter-spacing: .12em;
  text-align: left;
  white-space: nowrap;
}
.xb-table td {
  padding: 12px 14px;
  border-bottom: 1px solid rgba(46, 74, 104, .5);
  font-size: .92rem;
}
.xb-table tbody tr:nth-child(even) { background: rgba(27, 58, 92, .22); }
.xb-table tbody tr:hover {
  background: rgba(27, 58, 92, .5);
  box-shadow: inset 2px 0 0 var(--xb-orange);
}
.xb-table tbody tr:last-child td { border-bottom: 0; }

/* ---------- 折叠面板 ---------- */
.xb-collapse {
  border: 1px solid var(--xb-rule);
  border-radius: var(--xb-radius);
  background: rgba(18, 38, 63, .6);
  overflow: hidden;
}
.xb-collapse + .xb-collapse { margin-top: 12px; }
.xb-collapse[open] { border-color: rgba(255, 106, 31, .5); }

.xb-collapse > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}
.xb-collapse > summary::-webkit-details-marker { display: none; }
.xb-collapse > summary::after {
  content: "+";
  margin-left: auto;
  color: var(--xb-orange);
  font-family: var(--xb-font-mono);
}
.xb-collapse[open] > summary::after { content: "–"; }

.xb-collapse__body {
  padding: 0 18px 18px;
  color: var(--xb-mist);
  font-size: .9rem;
}

/* ---------- 索引列锚点 ---------- */
.xb-index-track {
  display: grid;
  gap: 2px;
  align-content: start;
  border-left: 1px solid var(--xb-rule);
}
.xb-anchor {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0 9px 14px;
  border-left: 2px solid transparent;
  color: var(--xb-mist);
  font-size: .82rem;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}
.xb-anchor__ix { font-family: var(--xb-font-mono); font-size: .62rem; color: var(--xb-rule); }
.xb-anchor:hover { color: var(--xb-snow); border-left-color: rgba(255, 106, 31, .6); }
.xb-anchor.is-active {
  color: var(--xb-snow);
  border-left-color: var(--xb-orange);
  background: linear-gradient(90deg, rgba(255, 106, 31, .14), transparent);
}
.xb-anchor.is-active .xb-anchor__ix { color: var(--xb-orange); }

/* ---------- 标签页 ---------- */
.xb-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--xb-rule);
}
.xb-tab {
  padding: 10px 14px;
  border-bottom: 2px solid transparent;
  color: var(--xb-mist);
  font-family: var(--xb-font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  cursor: pointer;
}
.xb-tab[aria-selected="true"],
.xb-tab.is-active { color: var(--xb-snow); border-bottom-color: var(--xb-orange); }

/* ---------- 快捷筛选栏 ---------- */
.xb-filterbar {
  position: fixed;
  left: 50%;
  bottom: 18px;
  z-index: 54;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  max-width: calc(100% - 32px);
  padding: 10px 14px;
  border: 1px solid var(--xb-rule);
  border-radius: 16px;
  background: rgba(18, 38, 63, .94);
  box-shadow: var(--xb-shadow);
  backdrop-filter: blur(10px);
  transform: translateX(-50%);
}
.xb-filterbar__label {
  color: var(--xb-mist);
  font-family: var(--xb-font-mono);
  font-size: .66rem;
  letter-spacing: .14em;
}

/* ---------- 面包屑 ---------- */
.xb-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 18px;
  color: var(--xb-mist);
  font-family: var(--xb-font-mono);
  font-size: .7rem;
  letter-spacing: .04em;
}
.xb-breadcrumb a { color: var(--xb-mist); }
.xb-breadcrumb a:hover { color: var(--xb-orange); }
.xb-breadcrumb__sep { color: var(--xb-rule); }
.xb-breadcrumb [aria-current="page"] { color: var(--xb-snow); }

/* ---------- 图片容器 ---------- */
.xb-media {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border: 1px solid var(--xb-rule);
  border-radius: var(--xb-radius);
  background:
    radial-gradient(120% 92% at 12% 6%, rgba(27, 58, 92, .92), transparent 62%),
    linear-gradient(155deg, var(--xb-night), var(--xb-deep));
  color: var(--xb-snow);
}
.xb-media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    repeating-linear-gradient(90deg, rgba(46, 74, 104, .5) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(0deg, rgba(46, 74, 104, .5) 0 1px, transparent 1px 56px);
  opacity: .55;
}
.xb-media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(115deg, transparent 41.6%, rgba(255, 106, 31, .18) 42%, rgba(255, 106, 31, .18) 42.8%, transparent 43.2%);
  pointer-events: none;
}
.xb-media--16x9 { aspect-ratio: 16 / 9; }
.xb-media--4x3 { aspect-ratio: 4 / 3; }
.xb-media--1x1 { aspect-ratio: 1 / 1; }
.xb-media--3x4 { aspect-ratio: 3 / 4; }

.xb-media > img,
.xb-media > video {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.xb-media__cap {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 2;
  padding: 4px 9px;
  border: 1px solid var(--xb-rule);
  border-radius: 6px;
  background: rgba(10, 26, 46, .78);
  color: var(--xb-mist);
  font-family: var(--xb-font-mono);
  font-size: .64rem;
  letter-spacing: .08em;
}

/* ---------- 动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .62s ease, transform .62s ease;
  transition-delay: var(--xb-delay, 0ms);
}
[data-reveal].is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
    transition-delay: 0ms !important;
  }
  .xb-meter__fill { transition: none !important; }
  .xb-btn,
  .xb-nav__link,
  .xb-footer__link,
  .xb-totop,
  .xb-anchor { transition: none !important; }
  .xb-btn--primary:hover,
  .xb-footer__link:hover { transform: none !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1120px) {
  .xb-header__meta { display: none; }

  .xb-navtoggle { display: inline-flex; order: 3; }

  .xb-nav {
    position: absolute;
    left: calc(var(--xb-gutter) * -1);
    right: calc(var(--xb-gutter) * -1);
    top: 100%;
    order: 4;
    background: var(--xb-deep);
    border-top: 1px solid var(--xb-rule);
    border-bottom: 1px solid var(--xb-rule);
    box-shadow: var(--xb-shadow);
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .34s ease, opacity .22s ease;
  }
  .xb-nav[data-open] {
    max-height: min(72vh, 540px);
    opacity: 1;
    overflow-y: auto;
  }

  .xb-nav__list {
    flex-direction: column;
    padding: 10px var(--xb-gutter) 16px;
  }
  .xb-nav__item { border-bottom: 1px dashed rgba(46, 74, 104, .55); }
  .xb-nav__item:last-child { border-bottom: 0; }
  .xb-nav__link { padding: 15px 4px; font-size: 1rem; }
  .xb-nav__ix { font-size: .66rem; }

  .xb-grid--5-7,
  .xb-grid--7-5,
  .xb-grid--4-8,
  .xb-grid--index { grid-template-columns: 1fr; }

  .xb-index-track {
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    gap: 4px;
    border-left: 0;
    border-bottom: 1px solid var(--xb-rule);
    overflow-x: auto;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }
  .xb-anchor {
    padding: 10px 12px;
    border-left: 0;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
  }
  .xb-anchor:hover { border-bottom-color: rgba(255, 106, 31, .6); }
  .xb-anchor.is-active {
    border-bottom-color: var(--xb-orange);
    background: linear-gradient(180deg, transparent, rgba(255, 106, 31, .14));
  }

  .xb-footer__grid { grid-template-columns: 1fr 1fr; }

  .xb-stack-offset > *:nth-child(2n) { transform: none; }
}

@media (max-width: 640px) {
  .xb-header__inner { min-height: 66px; gap: 10px; }
  .xb-brand__tagline { display: none; }
  .xb-brand__mark { width: 32px; height: 32px; border-radius: 9px; }
  .xb-header__actions .xb-btn { padding: 9px 12px; font-size: .76rem; }
  .xb-navtoggle__label { display: none; }

  .xb-footer__grid { grid-template-columns: 1fr; }
  .xb-footer__bottom { flex-direction: column; align-items: flex-start; }

  .xb-totop { right: 14px; bottom: 76px; width: 42px; height: 42px; }
  .xb-filterbar { bottom: 12px; padding: 8px 10px; }
  .xb-slant { clip-path: polygon(0 2rem, 100% 0, 100% 100%, 0 100%); margin-top: -2rem; padding-top: 3.4rem; }
}